I have an automatic 2007 Suzuki carry with push button 4wd. When I push the 4wd button I hear the control box behind the glove box clicking, but it will not switch into 4wd. I’m wondering if anyone would have the electrical schematics for that 4wd system. One other odd thing is that at the 4wd fuse, I only have 1.4 volts and it’s only there while the control box is clicking. Thoughts? Picture of the electrical schematic? thanks